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Dyfyniad Arddull ChicagoLevin, Richard I...[et al.]. Production /operation Management: Contemporary Policy for Managing Operating System. New Delhi: Tata McGraw Hill, 1972.
Dyfyniad MLALevin, Richard I...[et al.]. Production /operation Management: Contemporary Policy for Managing Operating System. Tata McGraw Hill, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.